系统版本：CentOS6.0 x86_64 HAProxy版本：1.4.21 Keepalived版本:1.2.1 Nginx版本：1.2.2 MASTER_IP:192.168.0.130 BACKUP_IP:192.168.0.131 VIP:192.168.0.133 WEB_1:192.168.0.134 WEB_2:192.168.0.135二、HAProxy安装：
cd /usr/src ;wget http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.21.tar.gz tar xzf haproxy-1.4.21.tar.gz &&cd haproxy-1.4.21 &&make TARGET=linux26 PREFIX=/usr/local/haproxy &&make install PREFIX=/usr/local/haproxy安装完毕，在/usr/local/haproxy/目录下会看到三个目录：doc、sbin、share
global log 127.0.0.1 local0 maxconn 65535 chroot /usr/local/haproxy uid 99 gid 99 daemon nbproc 8 pidfile /usr/local/haproxy/haproxy.pid defaults log 127.0.0.1 local3 mode http option httplog option httpclose option dontlognull option forwardfor option redispatch retries 2 maxconn 65535 balance source stats uri /web-status contimeout 5000 clitimeout 50000 srvtimeout 50000 listen chinaapp.sinaapp.com bind *:80 mode http option httplog log global option httpchk HEAD /index.html HTTP/1.0 server web1 192.168.0.134:80 weight 5 check inter 2000 rise 2 fall 3 server web2 192.168.0.135:80 weight 5 check inter 2000 rise 2 fall 3然后启动haproxy，如下执行启动命令：
/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/etc/haproxy.cfg [WARNING] 217/202150 (2857) : Proxy ‘chinaapp.sinaapp.com‘: in multi-process mode, stats will be limited to process assigned to the current request.会提示如上信息，nbproc进程如果设置为1则不会提示，如果想去掉这个提示可以修改编译文件即可。 在源码配置src/cfgparse.c找到如下行
if (nbproc > 1) {
if (curproxy->uri_auth) {
-
Warning("Proxy ‘%s‘: in multi-process mode, stats will
be limited to process assigned to the current request.\n",
+
Warning("Proxy ‘%s‘: in multi-process mode, stats will
be limited to the process assigned to the current request.\n",调整nbproc > 1数值即可。cd /usr/src ; wget http://www.keepalived.org/software/keepalived-1.2.1.tar.gz tar xzf keepalived-1.2.1.tar.gz cd keepalived-1.2.1 && ./configure –with-kernel-dir=/usr/src/kernels/2.6.32-71.el6.x86_64/ &&make &&make install DIR=/usr/local/ ;cp $DIR/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/ && cp $DIR/etc/sysconfig/keepalived /etc/sysconfig/ && mkdir -p /etc/keepalived && cp $DIR/sbin/keepalived /usr/sbin/四、配置keepalived:
! Configuration File for keepalived
global_defs {
notification_email {
wgkgood@139.com
}
notification_email_from wgkgood@139.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_haproxy {
script "/data/sh/check_haproxy.sh"
interval 2
weight 2
}
# VIP1
vrrp_instance VI_1 {
state BACKUP
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 151
priority 100
advert_int 5
nopreempt
authentication {
auth_typePASS
auth_pass 2222
}
virtual_ipaddress {
192.168.0.133
}
track_script {
chk_haproxy
}
}五、创建haproxy脚本：#!/bin/bash #auto check haprox process #2012-8-12 wugk killall -0 haproxy if [[ $? -ne 0 ]];then /etc/init.d/keepalived stop fiBACKUP同样如上配置haproxy、keepalived，配置完修改优先级为90即可，然后启动。
六、测试haproxy+keepalived：
如图当手动kill 掉131的haproxy进程后，130的keepalived后台日志显示如下，并且访问VIP 192.168.0.133 正常访问：
访问haproxy status如下图：
本文参考煮酒兄http://andrewyu.blog.51cto.com/1604432/669491 HAProxy+Keepalived高可用负载均衡配置
本文出自 “京峰教育-运维架构师培训” 博客，请务必保留此出处http://jfedu.blog.51cto.com/8172058/1686835
原文地址：http://jfedu.blog.51cto.com/8172058/1686835
